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I need your help. A friend has a pool and uses +13kwh per day on his pool pump. 860W AC pump. Would it use less kWh per day if the pump would be replaced by a DC version??? The motor might be able to replace, or a whole new pump. The basic idea is that DC is more efficient then AC, and AC...

Google : Can a grid-tie inverter be connected to batteries? In an AC coupled system, the grid-tied inverter is paired to an off-grid inverter and battery bank. The off-grid inverter provides a second power source, which effectively tricks the grid-tied inverter into staying online. This allows...

Hi there! One picture tells more then a hundred words :-) Thailand has the sun directly above our heads so the overhang of the roof casts a shadow. Sunrises on the right, and sundown on the left. Morning and later afternoon no shade. I have 2 x 12 panels. 5 can be covered half in the...

I have a strange but simple basic question. It appears there are 2 choice for solar. Grid tied: passing through the AC from the grid as much as needed, and provided solar to reduce the actual used electricity from the grid. To my knowledge most say 3kw grid tied are limited to 3kw solar, but...

Is it possible to charge an "empty" LifePo4 battery (say S8 / S16) with a fully charged lifepo4? (Same configuration) I know that lead acid doesn't have any trouble with joining 2, they level themselves out, and the "fast charge/ discharge" doesn't hurt the battery. Thank goodness, otherwise...

This is to balance against the negativity form @DestroyFX towards PowMR as a brand from this post **** I have used 3 X 60A PowMR, and nothing but praise, for the price. Yes, they have a loud small fan And they do run hot.. (Small heatsinks, just large enough) So absolutely room for...

Hi guys. Serious question. Why. I've been struggling for almost 1.5 years now with Eve and Lishen, and yes, learning a lot. I now know a lot more then when I started and shared most of my learning curve. Due my latest accident, I had no usable cells left FIY, that's almost $6.000 worth, +50...

Last week we had a nasty fire. I worked for months, used only high quality materials, tinned silicone wire that self fuses at 10A, and weeks between each step of construction to be absolutely sure things are safe The lower layer was good. Might look a mess with the wires, but absolutely safe...

Explain it to like I'm a 6 year old. I have several hybrid inverter who work in parallel and all is great, off grid. My friend bought the same type, he has (3 phase) 230v grid (No American setups) Basic wirering goes OK, Each phase into the inverter , the inverter has solar and battery and...

Some might be aware of my many adventures with my 88 LiFePO4 cells in the last 18 months or so, others will just step in. First let me start by why I needed to repair 39(!!) Threads. I was ignorant, noob, and stubborn. Many of the now available advice wasn't there 18 months ago. You might...

As some of you might know I needed help to buy epoxy stuff from USA, as it's unobtainable in Thailand. One forum member, @KauaiMolokai offered assistance, and I send him an email John wrote: "Hi Frank, A lot of people have helped me a lot so I'm happy to do some stuff in return. I can send...

I know this is not the correct forum part to ask this. The usage is. LOCTITE-28654-Form-A-Thread-NEW-Henkel-Loctite-236382 !! Apparently able to withstand 170lbs torque. (Not sure what size bolt) The (possible) best solution to fix the ripped out threads without any additional tools needed...

I have a problem. Due several changes in my setup almost all threads are lost. Hardest hit are my 152Ah cells, I used the bolts that where delivered with the cells at start.. Now I know: Only threaded rods! Still, with threaded rods, 4Nm is a lot of force. I've cleaned all recognisable...

Hi all, I want to share with you my electroplating process. Warning!!!! I use strong hydrochloric acid!! Only in a well ventilated place (outside) and use protection gloves band glasses. First step is to clean the copper. OCD type of clean. Next step is to create the electroplating...

Hi all, During my green LiFePO4 day's I used the screws provided by the sellers, and changed the setup a few times. Needless to say that the threads in the weak aluminium didn't like that. Git got that far that about half of the 48x 152 terminals are out of tread, locking agent no longer...

I'm trying to find out how much torque the terminal should get to have the bus-bar compressed tightly enough to ensure good contact. Yes, clean and flat materials :-) The white paper say: "The torsion should be less than 8Nm when used" And "The internal screw with size M4 is used in the pole. "...

New adventure.. I went inside the battery room. As the exhaust fans where working, and they are temp based, I felt OK to close the door. I used wood (MDF) to cover the cells and sit on top, and to prevent accident if something falls 2 left over pieces, 10mm, but strong enough to sit on, as...

Threaded rods are without doubt the best to use for cells. The bolts / screws that get delivered with the cells go in the big bucket :-) I like to share with you the benefits for using locking agent (Loctite) I have enough cells to test and play. What I found is that when I use threaded rod in...

It keeps being mixed up in my brain.. Hard to let go of lead acid thinking I guess. The average solar charge controler doesn't have only LiFePO4 settings. They normally have lead acid (Flooded, Gel, AGM) and "User" Some might have "lithium" as setting. User probably will have the options for...

Please just look at the pictures. To my understanding BYD is like "holy grape" A grade cells, yes? Price tag? $1425, including all tax. local transport? $9 For +650 km :-) You got to love Thailand for this :-) Please let me know your thoughts about this!!! ฿43,000.00 BYD LiFePO4 Module...

I'm having some issues with my all in one PV board. That have max 450 VOC voltage, and my panels are wired to +/- 360v. I'm just wandering if there are higher voltage mppt available that are in my budget. (48v system, or better 51.2 LiFePO4) A whole new unit is about $500,- Obviously the...

Daly sucks. That's a good start to begin with. There are too many people ordering Daly after @Will Prowse "set and forget" video, with all the drama in hundreds, thousands of posts here on the forum. Personal I like the active balancer BMS from ICGOGOGO, fist batch was bad quality. I heard...

I'm playing with solar for quite some time now and observed a strange phenomenon that I could not place. With my lead acid setup, 16 X 200Ah the rack to hold the batteries, made of thick iron beams, "suddenly" had electric charge. And not even a little!! Suddenly as in building the thing and...

Shunts.. (Wikipedia link) I have several of them, going from 20 to 500A. They are placed in the negative line and used to measure current flow in or out. There are different types 1, 0.5 or even 0.01% accuracy. Last one being most expensive. Most available are the 1 and 0.5% Available 60...

I'm building my new battery array, using the 48 X 152Ah and the 16 280Ah plus new 16 X 280Ah. Now, 64 of the cells are in use, and during use there is always imbalance. I like to disconnect the cells and place them all in parallel, using the 3.33v from the new 16 X 280 as target point for my...

Lately I've been getting negative news about Daly BMS, higher capacity ones. 150-250A units. They stop working after a few days or months. Daly is in my experience good with warranty, but I still lost 30 USD for sending the defective product back. Purchase price I got refund via PayPal, who...

So much combined knowledge here I don't want to miss the chance on asking. For LiFePO4 higher Amperage cells you connect the terminals with bus-bars. Bus-bars that are bolted onto the terminal. I personally use headless bolts as they place less stress at he weak shallow aluminium thread (only...

For sale: Tested and OK. I don't use as it requires my inverters to pre-charge. For me a not acceptable limitation. For most usages, not a problem at all. Naturally the 16S LiFePO4 BMS, set at 125A charge, 150A discharge. Also: Display !! UART to USB Bluetooth Battery Lightboard Temperature...

Sadly about 6-8 weeks ago my 250A Daly stopped working A few days later my 150A Smart Daly arrived, talking about timing :) anyways, I followed the steps provided by Daly to test: (Just the 3 pictures) As you can see: failure. It costed me $40,- to send to Daly China. (Post Corona...

Not my video, and it's long (possible could do some video editing :-) Anyway, this man opens his defective lifepo4 cell. You probably want to fast forward some parts, it is really interesting! You can actually see now why you should not lay your lifepo4 cells flat,but on the short side, or...

For a while now I have enough copper, but they are not usable for busbars. Copper wire, AC tubing, small parts. I got the crazy idea to make my own busbars by melting copper. And make molds out of clay. While the instructions look simple enough... It ain't. First attempt: Looking good at...

Hi all, I've been using this 1A active balancer from IC GoGoGo store for a while now I received it for free, as the active balancer BMS stopped working after 3 days. The seller had many returns, Do NOT buy (up to you, 2 forum members already paid the price..) During the 3 days it worked, I...

I can get 300w mono for 93.75 USD or 330w poly for 97.25 USD Naturally, at peak performance the poly is per watt cheaper. I don't buy for peak, we don't have it often... What panel provides more watts in lesser light conditions? (High clouds, etc) Or is this the same for both types?

Reactive power, power factor, phantom power, Voltage collapse, pffffft. Complicated material and I'm not sure what to think of it. My inverters have PV of 1.0. Several equipment have motors, who are apparently responsible for adding reactive power (Air-conditioning, refrigerator, water pump...

Hi, It looks like straight forward to answer, but it's not that simple! There is this list: SOC Cell V 100.00% 3.650 99.50% 3.450 99.00% 3.375 96.00% 3.363 90.00% 3.350 80.00% 3.325 70.00% 3.300 60.00% 3.275 50.00% 3.263 40.00% 3.250 30.00% 3.225 20.00% 3.200 14.00% 3.150 9.50% 3.000 5.00%...